In macos-14, programs that rely on cmocka need to specify CMOCKA_CFLAGS
as part of their CFLAGS. This has not been an issue so far on older
versions of macOS, or on any release of Ubuntu, but it should be done to
ensure that the library headers can be found.
When building the package for PPA, gcc throws errors indicating that
some variables may be used uninitialized. This is not a real problem
that shows up during the CI build, but only when building using
dpkg-buildpackage.
This change adds some dummy initialization so that it avoids triggering
those warnings during debuild/dpkg-buildpackage.